US5468137A - Apparatus for extruding a viscous material - Google Patents

Apparatus for extruding a viscous material Download PDF

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Publication number
US5468137A
US5468137A US08/106,677 US10667793A US5468137A US 5468137 A US5468137 A US 5468137A US 10667793 A US10667793 A US 10667793A US 5468137 A US5468137 A US 5468137A
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US
United States
Prior art keywords
extruding
die
passage
bore
helicoid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/106,677
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English (en)
Inventor
David C. Becktel
Harry B. Newman
Phillip E. Moldenhauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
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Caterpillar Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Caterpillar Inc filed Critical Caterpillar Inc
Priority to US08/106,677 priority Critical patent/US5468137A/en
Assigned to CATERPILLAR INC. reassignment CATERPILLAR INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BECKTEL, DAVID C., MOLDENHAUER, PHILIP E., NEWMAN, HARRY B.
Priority to JP17994594A priority patent/JP3589487B2/ja
Priority to IT94TO000667A priority patent/IT1266202B1/it
Priority to DE4428993A priority patent/DE4428993A1/de
Application granted granted Critical
Publication of US5468137A publication Critical patent/US5468137A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles

Definitions

  • This invention relates to an apparatus for extruding a viscous material containing discontinuous reinforcing fibers.
  • High pressure wire reinforced hydraulic hose is typically used in a variety of applications, for example, to provide a flexible connection between several moving parts of hydraulic circuits where one part must move relative to the other part.
  • Typical reinforced hydraulic hose structures are illustrated in U.S. Pat. No. 3,357,456 which issued on Dec. 12, 1967, to C. E. Grawey; and U.S. Pat. No. 4,262,704 which issued on Apr. 21, 1981, to C. E. Grawey.
  • the liner member is formed by wrapping a laminated tape in overlapping relationship on a mandrel and then winding a series of wire plies with layers of elastomer between adjacent wire plies.
  • the laminate tape is composed of two layers of uncured elastomer with an open mesh fabric sandwiched there between.
  • a problem associated with such a method of manufacture is that the length of the hose produced is limited by the length of the calendered laminate tape stock roll.
  • the manufacture of the laminate tape is a time consuming, labor intensive, relatively expensive multistep process that has a considerable waste by-product that cannot be recycled.
  • U.S. Pat. No. 3,933,960 which issued on Jan. 20, 1976, to James Cameron et al. illustrates a method of making a reinforced tube having short discontinuous fibers incorporated in the viscous material.
  • the fibers are circumferentially orientated to provide the necessary strength to resist internal pressures.
  • the flow will cause the fiber to orientate axially in the direction of the flow.
  • Examples of the discontinuous reinforcing fibers are shown in U.S. Pat. No. 3,697,364 which issued to K. Boustany et al. on Oct. 10, 1972, and U.S. Pat. No. 3,709,845 which issued to K. Boustany et al. on Jan. 9, 1973.
  • the subject invention provides a relatively simple extruding apparatus for the manufacture of a hose liner, on a continuous basis, in which discontinuous fibers are spirally orientated within the viscous polymer material as it is being extruded around the mandrel.
  • the extruding apparatus controls the spiral orientation of the fibers, increases the liner's radial strength, provides smooth outer peripheral surfaces, provides a liner with a constant wall thickness, and bridges the space between the wires.
  • the present invention is directed to overcome one or more of the problems as set forth above.
  • an apparatus for extruding viscous material containing discontinuous reinforcing fibers has an inlet end, an outlet end, an extruding body having an inner body surface defining a body bore having an axis, and an inlet passage opening into the body bore.
  • the extruding apparatus further includes a helicoid assembly having a helicoid bore coaxial with the axis of the body bore.
  • An extruder head assembly is connected to the body.
  • An extruding die defines an extruding passage.
  • the extruding passage has an internal bore receiving the helicoid.
  • the extruding die is connected to and rotatable with the rotating extruder head assembly.
  • a plurality of helical vanes extend inward from the conical converging surface.
  • a mandrel extends coaxially through the helicoid bore and the extruding die. Means is provided for rotating the head assembly relative to the body.
  • FIG. 1 is a diagrammatic illustration of the apparatus of this invention with portions broken away to show the relationship of the elements;
  • FIG. 2 is a diagrammatic and enlarged cross-sectional view through the the extruder head assembly
  • FIG. 3 is a diagrammatic end view of the extruding die
  • FIG. 4 is a diagrammatic cross-sectional view of the extruding die taken along line 4--4 of FIG. 3 showing a portion of the helical vains and intervening valleys;
  • FIG. 5 is a diagrammatic end view of the die taken along line 5--5 of FIG. 4;
  • FIG. 6 is a diagrammatic flat development view of the helical vains illustrating their angle shape with respect to the axial centerline of the die.
  • the extruding apparatus 10 has an inlet end 12, an outlet end 14, and a barrel or extruding body 16.
  • the extruding body 16 has an inner body surface 18 defining a body bore 20 having a central axis 22, a pilot hub 24 defining an outer cylindrical pilot surface 26 in axial alignment with the body bore, an outwardly projecting flange 28 having a mounting surface 30, and an inlet passage 32 opening into the body bore.
  • the inlet passage 32 is connected to a source for supplying viscous material, as is known in the art.
  • the extruding apparatus 10 further includes a helicoid assembly 36 having a helicoid bore 38 in axial alignment with the axis 22 of the body bore 20.
  • the helicoid assembly 36 includes a tubular nose 39 having an outer cylindrical surface 40 defining a preselected diameter and a distal end 42.
  • the apparatus 10 includes an extruder head assembly 44 rotatably connected to the extruding body 16.
  • the extruder head assembly 44 includes a generally tubular die support member 46, a die sleeve 48, an extruding die 50, a lock ring 52, and means 54 for rotating the extruder head assembly relative to the extruding body 16.
  • the tubular die support member 46 is rotatably fixed to the extruding body 16 by a retaining ring 56 which is secured to the mounting surface 30 of the extruding body 16.
  • the support member 46 is axially supported by a thrust bearing 58.
  • the die sleeve 48 is threadably connected to the support member 46.
  • the die sleeve 48 has an inner peripheral stepped surface 60 having a die sleeve shoulder 62 and an axial elongate key 64.
  • the extruding die 50 has a die body 68 having a die inlet end 70 and a die outlet end 72, an outer cylindrical die stepped surface 74 having a die shoulder 76 and an axial external elongate die keyway 78.
  • the die body 68 further defines a die extruding passage 80 for receiving the helicoid assembly 36.
  • the extruding die 50 is connected to and rotatable with the rotating extruder head assembly 44.
  • the outer cylindrical die stepped surface 74 is slidably disposed in the inner cylindrical stepped surface 60 of the die sleeve 48 with the key 64 of the die sleeve engaging with the keyway 78 of the extruding die 50 and the die shoulder 76 and the sleeve shoulder 62 in abutting relationship.
  • the die extruding passage 80 further defines a generally cylindrical surface 82 defining an exit diameter 84 having a predetermined cross-sectional area.
  • the die extruding passage 80 is in axial alignment with the helicoid bore 38.
  • the conical extruding passage 80 is generally conical decreasing in diameter in a direction toward the outlet end 72 of the extruding die 50.
  • a plurality of helical vanes 90 extend inward from the extruding passage 80.
  • the helical vanes 90 are disposed at a helix angle "A" of from 40 to 70 degrees relative to the axial center line of the extruding die 50.
  • a helix angle higher or lower would deviate from the desired angle sufficiently to negatively affect hose performance.
  • the vanes 90 are disposed at a helix angle "A" of approximately 55 degrees and decrease in width "W" toward the outlet end 72 of the extruding die 50.
  • the means 54 for rotating the extruder head assembly 44 relative to the extruding body 16 includes a sprocket wheel 94 operatively connected to the support member 46 by a plurality of capscrews 96 and an endless chain 98 encircling the sprocket wheel.
  • a mandrel 100 extends coaxially through the helicoid bore 36 and the die extruding passage 80.
  • the mandrel 100 is axially movable toward the outlet end 14 of the apparatus 10 as is known in the art with the viscous material being extruded about the mandrel and the mandrel later removed from the formed hose liner.
  • the polymeric material containing the discontinuous reinforcing fibers is distributed around the helicoid assembly 34 in a conventional manner.
  • the conical passage 80 of the extruding die 50 is configured to channel the molten material around the outer peripheral surface of the continuously moving mandrel 100.
  • the helical vanes 90 of the extruding die 50 create a plurality of channels whereby the discontinuous reinforcing fibers within the viscous material orientate themselves generally parallel with the flow of the material.
  • the angle of the fibers with reference to the longitudinal axis of the mandrel, is maintained within the range of approximately 40° to 70° and preferably at an angle of approximately 54° 44' which is the mathematical, theoretical desirable angle for fiber reinforcing. An angle of the fabrics higher or lower would deviate from the desired angle sufficiently to negatively affect hose performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Formation And Processing Of Food Products (AREA)
US08/106,677 1993-08-16 1993-08-16 Apparatus for extruding a viscous material Expired - Fee Related US5468137A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US08/106,677 US5468137A (en) 1993-08-16 1993-08-16 Apparatus for extruding a viscous material
JP17994594A JP3589487B2 (ja) 1993-08-16 1994-08-01 粘性材料押出装置
IT94TO000667A IT1266202B1 (it) 1993-08-16 1994-08-12 Apparecchiatura per l'estrusione di un materiale viscoso
DE4428993A DE4428993A1 (de) 1993-08-16 1994-08-16 Vorrichtung zum Extrudieren eines viskosen Materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/106,677 US5468137A (en) 1993-08-16 1993-08-16 Apparatus for extruding a viscous material

Publications (1)

Publication Number Publication Date
US5468137A true US5468137A (en) 1995-11-21

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Family Applications (1)

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US08/106,677 Expired - Fee Related US5468137A (en) 1993-08-16 1993-08-16 Apparatus for extruding a viscous material

Country Status (4)

Country Link
US (1) US5468137A (de)
JP (1) JP3589487B2 (de)
DE (1) DE4428993A1 (de)
IT (1) IT1266202B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5565218A (en) * 1996-01-03 1996-10-15 Brown; Jearl D. Center shot extrusion head for coating wire
DE19631532A1 (de) * 1996-07-24 1997-01-16 Stefan Krebs Verfahren und Vorrichtung zur nichtaxialen Ausrichtung von Fasern in einem rohrförmigen Produkt aus Faserverbund-Werkstoff
US5776519A (en) * 1997-06-06 1998-07-07 Graham Engineering Corporation Parison extrusion head with quick change die ring clamp assembly
US5804222A (en) * 1997-04-29 1998-09-08 Brown; Jearl D. Co-extrusion head for coating wire
US20060172028A1 (en) * 2005-02-01 2006-08-03 Visteon Global Technologies, Inc. Quick change head tooling for blow molding machine
CN108720066A (zh) * 2018-06-05 2018-11-02 佛山市精巨机械有限公司 一种通心粉模具

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357456A (en) * 1966-08-30 1967-12-12 Caterpillar Tractor Co Hose and method of manufacture
US3574810A (en) * 1967-03-15 1971-04-13 Pneumatiques Caoutchouc Mfg Method for manufacturing pipes possessing thermoplastic reinforcement
US3697209A (en) * 1968-09-20 1972-10-10 Schiesser Ag Apparatus for manufacturing reinforced tubings from plastic materials
US3697364A (en) * 1970-04-16 1972-10-10 Monsanto Co Discontinuous cellulose reinforced elastomer
US3709845A (en) * 1971-07-06 1973-01-09 Monsanto Co Mixed discontinuous fiber reinforced composites
US3933960A (en) * 1970-09-11 1976-01-20 Btr Industries Limited Method of extruding fiber reinforced plural layered plastic tubes
US4262704A (en) * 1978-08-30 1981-04-21 Caterpillar Tractor Co. High pressure reinforced hydraulic hose
US4362496A (en) * 1977-11-25 1982-12-07 Owens-Illinois, Inc. Apparatus for making plastic articles
US4501629A (en) * 1983-06-29 1985-02-26 Caterpillar Tractor Co. Method and apparatus for extruding reinforced hose
US4553922A (en) * 1983-09-21 1985-11-19 Eduard Winner Apparatus for processing material
US4584154A (en) * 1985-03-01 1986-04-22 Ball Corporation Crosshead with longitudinal and transverse shear mixers
US4731216A (en) * 1985-05-29 1988-03-15 E. I. Du Pont De Nemours And Company Process for manufacturing a seamless laminar article
US4798696A (en) * 1987-05-08 1989-01-17 A/S Sonnichsen Rorvalseverket Method for extrusion of plastic tubes, and an apparatus for carrying out said method
US4931237A (en) * 1989-01-23 1990-06-05 Amoco Corporation Extrusion die apparatus and process for producing tubular film from thermoplastic molten material
US5059375A (en) * 1989-11-13 1991-10-22 Minnesota Mining & Manufacturing Company Apparatus and method for producing kink resistant tubing

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357456A (en) * 1966-08-30 1967-12-12 Caterpillar Tractor Co Hose and method of manufacture
US3574810A (en) * 1967-03-15 1971-04-13 Pneumatiques Caoutchouc Mfg Method for manufacturing pipes possessing thermoplastic reinforcement
US3697209A (en) * 1968-09-20 1972-10-10 Schiesser Ag Apparatus for manufacturing reinforced tubings from plastic materials
US3697364A (en) * 1970-04-16 1972-10-10 Monsanto Co Discontinuous cellulose reinforced elastomer
US3933960A (en) * 1970-09-11 1976-01-20 Btr Industries Limited Method of extruding fiber reinforced plural layered plastic tubes
US3709845A (en) * 1971-07-06 1973-01-09 Monsanto Co Mixed discontinuous fiber reinforced composites
US4362496A (en) * 1977-11-25 1982-12-07 Owens-Illinois, Inc. Apparatus for making plastic articles
US4262704A (en) * 1978-08-30 1981-04-21 Caterpillar Tractor Co. High pressure reinforced hydraulic hose
US4501629A (en) * 1983-06-29 1985-02-26 Caterpillar Tractor Co. Method and apparatus for extruding reinforced hose
US4553922A (en) * 1983-09-21 1985-11-19 Eduard Winner Apparatus for processing material
US4584154A (en) * 1985-03-01 1986-04-22 Ball Corporation Crosshead with longitudinal and transverse shear mixers
US4731216A (en) * 1985-05-29 1988-03-15 E. I. Du Pont De Nemours And Company Process for manufacturing a seamless laminar article
US4798696A (en) * 1987-05-08 1989-01-17 A/S Sonnichsen Rorvalseverket Method for extrusion of plastic tubes, and an apparatus for carrying out said method
US4931237A (en) * 1989-01-23 1990-06-05 Amoco Corporation Extrusion die apparatus and process for producing tubular film from thermoplastic molten material
US5059375A (en) * 1989-11-13 1991-10-22 Minnesota Mining & Manufacturing Company Apparatus and method for producing kink resistant tubing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5565218A (en) * 1996-01-03 1996-10-15 Brown; Jearl D. Center shot extrusion head for coating wire
DE19631532A1 (de) * 1996-07-24 1997-01-16 Stefan Krebs Verfahren und Vorrichtung zur nichtaxialen Ausrichtung von Fasern in einem rohrförmigen Produkt aus Faserverbund-Werkstoff
DE19631532C2 (de) * 1996-07-24 1998-12-24 Stefan Krebs Vorrichtung zur nichtaxialen Ausrichtung von Fasern in einem rohrförmigen Produkt aus Faserverbundwerkstoff
US5804222A (en) * 1997-04-29 1998-09-08 Brown; Jearl D. Co-extrusion head for coating wire
US5776519A (en) * 1997-06-06 1998-07-07 Graham Engineering Corporation Parison extrusion head with quick change die ring clamp assembly
US20060172028A1 (en) * 2005-02-01 2006-08-03 Visteon Global Technologies, Inc. Quick change head tooling for blow molding machine
CN108720066A (zh) * 2018-06-05 2018-11-02 佛山市精巨机械有限公司 一种通心粉模具

Also Published As

Publication number Publication date
DE4428993A1 (de) 1995-02-23
ITTO940667A1 (it) 1996-02-12
ITTO940667A0 (it) 1994-08-12
IT1266202B1 (it) 1996-12-23
JPH0768618A (ja) 1995-03-14
JP3589487B2 (ja) 2004-11-17

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AS Assignment

Owner name: CATERPILLAR INC.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BECKTEL, DAVID C.;NEWMAN, HARRY B.;MOLDENHAUER, PHILIP E.;REEL/FRAME:006669/0326

Effective date: 19930811

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STCH Information on status: patent discontinuation

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Effective date: 20071121